Zymol and
Meguiars are pretty much on opposite ends of the spectrum, at least price-wise. As for appearance, if a good job was done with products by both companies I'd bet 9 out of 10 people couldn't tell them apart.
That said, Zymol does have some of the finest waxes around. Durability is not usually thought of as a forte, it's more of a "beauty wax". BTW, part of the Zymol process includes HD-Cleanse, which is a paint cleaner that will clean and prepare the surface after whatever else you've used on your car before.
Meguiars has a variety of products, all much more affordable than Zymol. They're a solid company and I'd have no problem recommending many of their products to anyone around.
I've used some Meguiars stuff, like
NXT wax (really more of a sealant), and it looks great. I remember almost looking forward to rainstorms because when it was over I could watch the water sheet off the car so completely it was practically self-drying. Over the winter I picked up some Zymol Carbon and Concours that I intend to have some fun with this summer.